Shripad even Ive noticed that the TX-2 doesn't really work well for GPUs. The temps of my Q6600 on idle/load are really good with the CCF. 35-38 deg C. on idle and max 47-50 deg C. on load but my HD 4850 dual slot runs at 47-50 deg even on idle conditions after I applied the TX-2 on it. (everything's @ stock /fan speed auto-27-30%) After reading your post ,now i feel like removing the heatsink and checking the card if the thermal paste has dried up.
How much does the MX-3 cost ?Is it available locally ?